Lets make the patties first. Combine all the ingredients in a mixing bowl and mix gently. The egg should be just fold in. This will make the patties soft and juicy. Keep aside for 15 minutes meanwhile we prepare the rest.

Apply some butter on both the sides of the bun or roll and grill it to give some color on the inside. I use griddle for this you can use any flat pan or stove grill.

Combine the ingredients for sauce and cut tomato and onion into slices.

Make 6 thick patties of the chicken mixture and grill them or shallow fry them for 5 mins per side. When you put the chicken patties put the onion as well. This will caramelise the onion while the patty is being cooked.

Before taking the patty off the grill place a slice of cheese on it and let it melt a little.

On grilled buns, put a dollop of the sauce on the crown (to part of the bun) and lettuce leaf on the heal (lower part of the bun).